The financial statement that reports the revenues and expenses for a period of time such as a year or a month is called _?

statement of comprehensive income

This is called profit and loss account for a particular period.

its called Income statement or Profit and loss account

called Profit & Loss Report 

the financial statement that reports the revenues & expenses for a specific period of time and also demonstrates the P&L is Income statement.

Income statement is the financial statement which explains the revenues and expenses for a specified period